Clock



M y 1944. 1. A. FROSTLING ETAL 2,348,120

CLOCK Filed July 28, 1942 INVENTORS.

ATTORNEY.

Patented May 2, 1944 CLOCK Ivar August Frostling, Boxholm, and Ellis Gerhard Karlsson, Malexander, Sweden Application July 28, 1942, Serial No. 452,622 In Sweden October 12, 1940 8 Claims.

The invention relates to clocks and more particularly to striking mechanisms thereof. The principal object of the invention is to create a striking mechanism operated by the clockwork so that the clockwork itself directly efiects the strokes of the clock and in which the different strokes as regards striking power and intervals between the different strokes may be exactly and accurately effected. A further object of the invention is a clock the construction of which enables an easy change of parts and in its entirety considerably simplifies clocks with striking mechanisms and makes them cheap in manufacture.

Other objects of the invention will be made clear by the following description with reference to the accompanying drawing illustrating an embodiment of the invention. In the drawing, Figure 1 shows a view of the clockwork viewed from the rear side of the clock. Figure 2 is a vertical section of the same clock on a plane perpendicular to Figure 1.

In the cover or casing I the ordinary clockwork 2 is provided, and the hour-hand 3 and minute-hand 4 move as usually about the centre of the spindle or shaft 5 of the minute-hand. Upon this shaft a driving arm or member 6 is attached for operation of the striking mechanism. The shaft 5 also carries the usual screw-nipple l by which the clock may be adjusted.

Upon an immovable shaft 9, a disc 8 is journalled by means of its central socket-shaped hub portion I0. It is of importance that the disc 8, which is operated by the clockwork and intermittently rotates about the shaft 9, performs this motion with determined time-intervals and moves only in one direction, and for this purpose the hub-socket It! is provided somewhat stifily upon the shaft which may be done thereby that the extreme end portion of the socket II] is slotted, the slotted portions springing inwards towards the shaft 9. In order to prevent all retrograde movement of the disc 8, between the disc and the socket thereof a return pawl (not shown in the drawing) may be provided. Pins H attached to the disc 8 and axially projecting therefrom are operated by the arm 6 in such a mannor that for each revolution of the shaft 5 of the minute-hand 4 one of the pins II will engage with the arm and move the disc 8 about its axis a distance corresponding to the distance between two adjacent pins.

Twelve striking hammer-like members 12 depend at the side of each other from a shaft l3 with interspaces between the different hammers I2. These interspaces may be formed by laterally projecting hub portions of the hammers. In a slight distance from the striking portions of the freely depending hammers l2 a bell I4 is provided. It is carried by a holder l5 attached to a plate 16 which is fastened to the clockwork 2 and carries the shafts 9 and I3.

Above the shaft I 3 the stem portions of the hammers l2 are elongated. As shown in the drawing, the elongated portions of the hammers have different length increasing gradually outwards from the plate !6. Also the lengths of the pins are regularly increased from the first to the twelfth pin. By this arrangement each pin ll may operate the number of hammers I2 corresponding to the stroke of the clock for Which the pin is designed. It is evident that the disc 8 moves relatively slow about its axis, and thus each pin l l during a certain time will slide along those end-surfaces of the hammers with which it comes in contact, and a corresponding number of hammers I 2 are thereby pivoted from the bell I4. As soon as a pin H has disengaged the corresponding number of hammer l2, the latter will swing back and strike on the bell I l. The hammers will then swing down one by one, and, for instance, when at five oclock the pin in question has engaged with five hammers and disengaged the same one by one, the clock strikes five strokes.

The details of the clock shown and described may be varied as to number, material, form and general arrangement Without departing from the spirit of the invention.

What we claim is:

1. In clocks, a clockwork, a shaft driven by the clockwork, a rotatory disc, pins carried by said disc, a member carried by said shaft and adapted to co-operate with said pins so as to give the disc an intermittent movement about its axis corresponding to the distance between two adjacent pins for each revolution of said shaft, a plurality of movable striking members arranged to be operated by the pins, and a bell provided adjacent to the striking members, the arrangement of the pins and striking members being such that in each revolution of the shaft a number of said striking members will be operated by one of the pins so as to strike on the bell.

2. In clocks, a clockwork, a shaft driven by the clockwork, a rotatory member carrying twelve pins, an arm carried by said shaft and adapted to engage with said pins so as to give said rotatory member an intermittent movement about its axis corresponding to the distance between two adjacent pins for each revolution of said shaft, twelve movable striking members mounted for cooperation with the pins, and a bell provided adjacent to the striking members, the pins having different lengths and arranged for engagement with the pins in such a manner that for each stroke of the clock one of the pins engages with a number of striking members corresponding thereto.

3. In clocks, a clockwork, a shaft driven by the clockwork, a rotatory disc, a set of pins carried by said disc in annular arrangement, a member carried by said shaft and adapted to engage with the pins so as to give the disc an intermittent movement about its axis corresponding to the distance between two adjacent pins for each revolution of the shaft, a second shaft, movable striking hammers depending from said second shaft, a bell provided adjacent to the striking hammers, the hammers havin elongated portions of different lengths extending above the second shaft, one of said pins adapted to engage with a corresponding number of said elongated portions in each revolution of the first mentioned shaft so that upon disengagement of the pin from said elongated portions the striking hammers one by one strike on the bell.

4. In clocks, a clockwork, a shaft driven by the clockwork, a rotatory member, a set Of pins carried by said member in annular arrangement about the axis thereof, the lengths of the pins increasing successively, a member carried by said shaft and adapted to engage with said pins so as to give said rotatory member an intermittent movement about its axis corresponding to the distance between two adjacent pins for each revolution of said shaft, a second shaft, movable strikin members supported by and depending from the second shaft, said striker members having elongated portions of successivel increasing lengths projecting above said second shaft, a number of the striking members bein adapted by said elongated portions to engage with one of said pins for each revolution of the first mentioned shaft so that upon disengagement of the pin from said elongated portions the striking members one by one strike on the bell.

5. A clock having a striking mechanism operated from the driving means which drives the time-indicating mechanism, said strikin mechanism comprising a, plurality of hammers corresponding in number to the maximum number of notes to be sounded, sound-producing means, means suspending the hammers in juxtaposition to said sound-producing means so as to be oscillated individually for strikin said sound-producing means, a member driven from the driving means of the clock, and spaced hour-representing abutments carried by said driven member and correspondin in number to said hammers and adapted each to engage a determined number of said hammers to impart oscillation to one or more of said hammers for sounding said sound-producing means, the driven member being movable during each hour period through an angle corresponding to the distance between two adjacent abutments for successively operating the abutments, the arrangement of the abutments and hammers being such that each abutment representing an hour other than the first hour operates in succession a number of hammers for producin the number of sounds indicating that particular hour.

6. A clock as claimed in claim 5 wherein the driven member is rotatably mounted and the abutments project from said member substantially parallel to the axis of said member and are arranged in a circular path concentric with said axis, equidistantly spaced and progressively increasin in length, and wherein the hammers oscillate about a common axis and have arms of progressively increasing radial dimensions relatively to said axis and adapted to be engaged by said abutments.

'7. A clock as claimed in claim 5 wherein the driven member is intermittently movable by means of an arm engageable with the abutments and rotated by the clock-work one revolution for each hour period.

8. In clocks, a clockwork, a shaft driven by the clockwork, a minute hand movable by said shaft, a rotatory member, a set of pins in annular arrangement carried by said rotatory member, a member carried by said shaft and adapted to co-operate with the pins so as to give the rotatory member an intermittent movement about its axis corresponding to the distance between two adjacent pins for each revolution of the shaft, a plurality of movably mounted striking members equal in number to the pins and arranged so as to be operated by the respective pins at different successive points in the path of rotation of the rotatory member, and a bell arranged adjacent to said striking members, said pins and members being also so constructed and relatively arranged as to adapt the pins to be successively brought by successive movements of the shaft into position to engage successively increasing members of the strikin members to operate the same to strike the bell.

IVAR. AUGUST FROS'I'LING.

ELIS GERHARD KARLSSON. 

